Year	Percent
1960-01-01	55.47350000000000
1961-01-01	51.28550000000000
1962-01-01	61.53960000000000
1963-01-01	73.73560000000000
1964-01-01	73.78320000000000
1965-01-01	76.70030000000000
1966-01-01	76.42000000000000
1967-01-01	75.15330000000000
1968-01-01	73.28750000000000
1969-01-01	72.11480000000000
1970-01-01	82.37700000000001
1971-01-01	102.76500000000000
1972-01-01	109.75100000000000
1973-01-01	109.65899999999999
1974-01-01	110.97700000000000
1975-01-01	111.67200000000001
1976-01-01	112.60200000000000
1977-01-01	112.69100000000000
1978-01-01	111.87200000000001
1979-01-01	111.98100000000001
1980-01-01	115.35000000000000
1981-01-01	116.73700000000001
1982-01-01	121.03600000000000
1983-01-01	126.47900000000000
1984-01-01	129.04300000000000
1985-01-01	130.66899999999998
1986-01-01	136.32700000000000
1987-01-01	146.90800000000000
1988-01-01	154.68300000000000
1989-01-01	161.08700000000002
1990-01-01	164.83200000000000
1991-01-01	166.71500000000000
1992-01-01	170.47099999999998
1993-01-01	174.56500000000000
1994-01-01	174.96099999999998
1995-01-01	173.80000000000000
1996-01-01	172.44700000000000
1997-01-01	178.92500000000000
1998-01-01	189.03000000000000
1999-01-01	192.46700000000000
2000-01-01	186.50799999999998
2001-01-01	185.00599999999997
2002-01-01	183.65599999999998
2003-01-01	181.04900000000000
2004-01-01	175.99099999999999
2005-01-01	171.97799999999998
2006-01-01	170.32100000000000
2007-01-01	163.80000000000000
2008-01-01	163.59500000000000
2009-01-01	168.50300000000000
2010-01-01	161.51400000000000
2011-01-01	160.89000000000000
2012-01-01	158.75200000000000
2013-01-01	158.53900000000000
2014-01-01	160.68500000000000
2015-01-01	159.28200000000000
2016-01-01	159.99800000000000